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E-81
Power Supply: Solar cell and one rechargeable battery
Approximate battery operating time: 6 months (from full charge to Level 5
(CHG)) under the following conditions:
• Watch not exposed to light
• Internal timekeeping
• Display on 18 hours per day, sleep state 6 hours per day
• 1 illumination operation (1.5 seconds) per day
• 10 seconds of alarm operation per day
• 4 minutes of signal reception per day
Frequent use of illumination runs down the battery. Particular care is required
when using the auto light switch (page E-77).